Test Preparation For DTC Readout

Connect impulse counter scan tool and adapter or HHT to data link connector (X11/4). See Fig 1.
Connect Yellow wire from impulse counter scan tool as follows:
1. Socket 8
  
  Base Module - BM (N16/1)
2. Socket 6
  
  ABS or ASR control module (N30 or N30/1)
3. Socket 12
  
  SPS control module (N49/1)
4. Socket 11
  
  ADS control module (N51)
5. Socket 4
  
  HFM-SFI control module (N3/4)
Turn ignition ON.
Read DTC memory for BM, ABS, ABS/ASR, SPS, ADS, HFM-SFI control modules.

Fig 1: Identifying Special Tools

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.